In my highschool programming class we made a TSR (in Borland pascal) that would change every 15th keypress to an “e”. It wasn’t self propagating, so it wasn’t a virus per day, but it was highly annoying. It survived on memory after the netware logoff, and you could only get rid of it by rebooting.
We also had these everex brand 286 or 386 computers… They had a little LCD screen that would read out what sector/track was being read on the disk. We found the memory address (80h) where we could write arbitrary text to the LCD. That was fun.
In my highschool programming class we made a TSR (in Borland pascal) that would change every 15th keypress to an “e”. It wasn’t self propagating, so it wasn’t a virus per day, but it was highly annoying. It survived on memory after the netware logoff, and you could only get rid of it by rebooting.
We also had these everex brand 286 or 386 computers… They had a little LCD screen that would read out what sector/track was being read on the disk. We found the memory address (80h) where we could write arbitrary text to the LCD. That was fun.